Short answer: In the series Stranger Things, Will Byers is found after being abducted into the Upside Down; he is located unconscious in the Upside Down version of the Hawkins Public Library basement and is revived by Hopper and Joyce.

Details and context

• What happened initially: Will vanishes on the night of November 6, 1983, after encountering a monster connected to the Upside Down. His disappearance drives the central rescue arc of Season 1.

• Where he’s found: He is rescued from the Upside Down environment in the basement area of the Hawkins Public Library, where the group locates him unconscious and entangled in the vines of the shadow realm. He is then returned to the real world.

• Aftermath: Will returns home, but manifestations of his time in the Upside Down linger, including mind-space connections and physical effects observed later in the series.

Additional notes

• Will’s experiences are foundational to establishing the connection between Hawkins Laboratory experiments, the Upside Down, and the broader season-long mystery.

• There are numerous theories and extended discussions about the broader implications of Will’s experiences in later seasons, but the core moment of being found is specifically at the library basement in the Upside Down.

If you’d like, I can pull up closer recap quotes or scene-by-scene breakdowns from Season 1 to pinpoint the exact visual sequence of his discovery.